Hello.
I've been struggling with this one for over a week, but for some reason my
mind isn't compatibile with the problem - it seems simple, yet I'm unable
to find the proper solution :(.
I have a timeline divided to 15 minute periods:
start |
--+
8:00 |
8:15 |
8:30 |
8:45 |
(...)|
Marcin Stępnicki wrote:
start | finish | type_id
--++
8:30 | 8:45 |1- type A
9:30 | 10:00 |2- type B
I have to deal with the existing schema, but if it can be done in a
better way please let me know so I could avoid mistakes in my own programs
Richard Huxton wrote:
Marcin Stępnicki wrote:
start | finish | type_id
--++
8:30 | 8:45 |1- type A
9:30 | 10:00 |2- type B
I have to deal with the existing schema, but if it can be done in a
better way please let me know so I could avoid mistakes in
Marcin Stępnicki wrote:
Now I need to create a query to find hours at which each of the type can
start. So, if it's event A (which take 15 minutes) it can start at:
8:00 (to 8:15)
8:15 (to 8:30)
( 8:30 to 8:45 is already taken )
8:45 (to 9:00)
9:00 (to 9:15)
9:15 (to 9:30)
( 9:30 to
Alvaro Herrera wrote:
Marcin Stępnicki wrote:
Now I need to create a query to find hours at which each of the type can
start. So, if it's event A (which take 15 minutes) it can start at:
8:00 (to 8:15)
8:15 (to 8:30)
( 8:30 to 8:45 is already taken )
8:45 (to 9:00)
9:00 (to 9:15)
9:15 (to
